Wurkkos FC11 2700K Flashlight Review

Wurkkos FC11 2700K Flashlight Review

The Wurkkos FC11 2700K 18650 Flashlight is somewhat well covered by reviews lately, but I was intrigued enough by this light to convince Wurkkos to send one for review.  I was particularly interested in the 2700K version, and that’s what they sent.  Read on for some thoughts and testing!

Official Specs and Features

Here’s a link to the Amazon product page.


I believe there’s only one body for the FC11.  But I know of at least two emitter temperature options:  2700K and 4000K.  I think there may also be a 5000K, but I’m less certain on that.


Looks like the current price is $29.97 on amazon.  (referral link here).

Short Review of the Wurkkos FC11 2700K 18650 Flashlight

This light is definitely worth $30, and I recommend you buy one!

Wurkkos FC11 2700K 18650 Flashlight Long Review

The Big Table

Wurkkos FC11 2700K 18650 Flashlight
Emitter: Samsung LH351d (2700K, 90CRI)
Price in USD at publication time: $29.97 at Amazon (referral link)
Cell: 1×18650 (included)
Turbo Runtime Graph High Runtime Graph
LVP? Switch warning
Switch Type: E-Switch
Quiescent Current (mA): 1.46
On-Board Charging? Yes
Charge Port Type: USB-C
Charge Graph
Power off Charge Port with cell: one mode
without cell: one mode
Claimed Lumens (lm) 1300
Measured Lumens (at 30s) 766 (58.9% of claim)^
Candela per Lumen 7.8
Claimed Throw (m) 144
Candela (Calculated) in cd (at 30s) 173lux @ 5.248m = 4765cd
Throw (Calculated) (m) 138.1 (95.9% of claim)^
All my Wurkkos reviews!

^ Measurement disclaimer:  Testing flashlights is my hobby. I use hobbyist-level equipment for testing, including some I made myself. Try not to get buried in the details of manufacturer specifications versus measurements recorded here; A certain amount of difference (say, 10 or 15%) is perfectly reasonable.

What’s Included

wurkkos fc11 flashlight what's included

  • Wurkkos FC11 2700K 18650 Flashlight
  • Wurkkos 3000mAh 18650
  • Charge cable (USB to USB-C)
  • Lanyard
  • Spare o-rings (2)
  • Manual etc

Package and Manual

wurkkos fc11 flashlight manual

Build Quality and Disassembly

wurkkos fc11 flashlight feature photo

I would describe the build quality of this inexpensive light as “good” or even “very good.”

It’s maybe twice the price of something like a Convoy S2+, and the build quality is definitely much better.

wurkkos fc11 flashlight emitter

The standout for me is that this one is available as 2700K 90CRI, which is great.

wurkkos fc11 flashlight tailcap

wurkkos fc11 flashlight head and switch

wurkkos fc11 flashlight switch

The body doesn’t have knurling but does have rings for grip.  They don’t do a whole lot to aid in holding, though.

wurkkos fc11 flashlight body

The tailcap has an appropriate grip, however, which aids in removal.

wurkkos fc11 flashlight tailcap

On the head are shallow cooling fins.

wurkkos fc11 flashlight switch profile

wurkkos fc11 flashlight pocket clip profile

wurkkos fc11 flashlight lanyard hole

A press-in charge port cover keeps the USB-C charge port safe from debris and water.

wurkkos fc11 flashlight charge port cover

wurkkos fc11 flashlight charge port cover open

wurkkos fc11 flashlight switch detail

wurkkos fc11 flashlight cooling fins

Threads on the FC11 are square-cut, moderately long, and lightly (if at all) lubed.

wurkkos fc11 flashlight tailcap off

While the pocket clip can install in only one end, the cell tube is actually reversible – threading is the same on both ends.

wurkkos fc11 flashlight cell tube

A magnet is in the tailcap, and this magnet is adequate strength for holding even in a horizontal position.

wurkkos fc11 flashlight tailcap off with magnet

Both head and tail have big beefy springs, and if you notice carefully on the head end, there’s a “+” for cell direction.

wurkkos fc11 flashlight head and tail springs

wurkkos fc11 flashlight cell installed

wurkkos fc11 flashlight indicating switch

wurkkos fc11 flashlight on low

Size and Comps

Officially the size is:

116.23mm x 27mm, and 65g (without cell).

If the flashlight will headstand, I’ll show it here (usually the third photo).  If the flashlight will tailstand, I’ll show that here, too (usually the fourth photo).

Here’s the test light with the venerable Convoy S2+.  Mine’s a custom “baked” edition Nichia 219b triple.  A very nice 18650 light.

And here’s the light beside my custom engraved TorchLAB BOSS 35, an 18350 light.  I reviewed the aluminum version of that light in both 35 and 70 formats.

wurkkos fc11 flashlight beside torchlab boss 35

This image below is just all in fun – the cell tube is completely gone here.  But wouldn’t this be a fun little light!  (Shorter than an 18350 version, though.)

wurkkos fc11 flashlight with cell tube removed - joke photo

Retention and Carry

Mainly the FC11 will be carried using the included friction fit pocket clip, which installs on the tail end.  This means bezel down carry is the default.

It’s a friction fit clip, like I said, so…. clip hug!

wurkkos fc11 flashlight pocket clip hug

But the cell tube is reversible, so if you wish to have bezel up carry, then just flip the cell tube.  The balance will be a little off, but it works.  The location of the clip on the body with “bezel up” carry would make this a reasonable hatlight solution.

wurkkos fc11 cell tube

Another option for retaining the FC11 is the included lanyard, which attaches through this hole in the tailcap.  There are also places on the pocket clip to attach the lanyard, but as it’s a friction fit clip, I’d recommend sticking with the hole in the tailcap.

wurkkos fc11 flashlight lanyard hole

Finally, we have the tailcap magnet, which holds the FC11 quite securely on the right base.

wurkkos fc11 flashlight tailcap magnet

Power and Runtime

The voltage range for the FC11 is 2.7V-4.2V, so that means it runs on a single lithium-ion cell.  Included with the purchase of the Wurkkos FC11 is a 3000mAh 18650.

wurkkos fc11 flashlight 3000mAh 18650

This cell is a button-top and appears standard in every way.

Since the FC11 has springs on the head and tail, there’s nothing preventing usage of any type 18650.  Flat top, button top, protected, unprotected – they all should work fine.

wurkkos fc11 flashlight 3000mAh 18650 beside light

Cell installation is normal – positive end toward the head.  You can remove the tailcap or the head to install the cell.

wurkkos fc11 flashlight 3000mAh 18650 installed

Provided below are a few runtimes.  The claim of 1300 lumens is almost certainly for the 4000K version.  It doesn’t seem that Wurkkos provided specs for this very warm and higher CRI edition.  Both of those factors will mean that we can expect the output to be less, and that’s what we see in fact.  I have a bigger issue with not speccing the 2700K option, than for “being wrong” or “misleading” necessarily.

wurkkos fc11 flashlight 3000mAh 18650 runtime graph turbo

Both Turbo and High have a big stepdown after a minute or two, and then the output just trails off.  At around 2.9V or so, the switch begins to warn of low voltage.

wurkkos fc11 flashlight 3000mAh 18650 runtime graph high

wurkkos fc11 flashlight 3000mAh 18650 runtime graph medium

When the light is turned on, the indicating switch will light momentarily to advise of cell voltage, as follows:
Green:  Power >30%
Red: Power <30%
Red Flashing: Recharge cell as soon as possible


A USB-C port is used for charging, and it’s on the head and opposite the switch.

A press-in cover protects the port.  The cover is really quite nice.

Wurkkos provides a USB to USB-C cable, too.

Charging looks pretty good if a little slow at around 1A. The time required is over 4 hours, and termination voltage is a little low at around 4.15V.

wurkkos fc11 flashlight charge graph

Modes and Currents

Mode Mode Claimed Output (lm) Claimed Runtime Measured Lumens Tailcap Amps
Turbo 1300 1h20m 766 4.36
High 700 2h45m 452 1.72
Mid 300 9h 177 0.62
Low 50 45h 35 0.15
Eco 2 275h ~ 0.01

Pulse Width Modulation

All the lower modes and I think even Turbo utilizes pulse width modulation.  It’s fast, and I don’t notice it, though.

For reference, here’s a baseline shot, with all the room lights off and almost nothing hitting the sensor.  Also, here’s the light with the worst PWM I could find.  I’m adding multiple timescales, so it’ll be easier to compare to the test light.  Unfortunately, the PWM on this light is so bad that it doesn’t even work with my normal scale, which is 50 microseconds (50us). 10ms5ms2ms1ms0.5ms0.2ms.  In a display faster than 0.2ms or so, the on/off cycle is more than one screen, so it’d just (very incorrectly) look like a flat line.  I wrote more about this Ultrafire WF-602C flashlight and explained a little about PWM too.

User Interface and Operation

A single switch is used to control the FC11.  It’s an e-switch in the head of the light, and has indicating emitters under the translucent black cover.

wurkkos fc11 flashlight switch detail

Texture is one way to differentiate the switch from the charge port cover, but also the charge port cover has more of a rounded (off the body) feel, while the switch feels flatter.

wurkkos fc11 flashlight switch profile

Below, the switch is indicating green.

wurkkos fc11 flashlight switch indicating in green

There are two mode groups on the FC11.  The default is stepped, which has five output levels, and no ramping.  The second utilizes ramping.

Here’s a UI table for Group 1!

State Action Result
Off Hold Eco
Off Click On (Mode Memory)
Off Double Click Turbo
On Click Off (Except in Turbo)
On Hold Mode Cycle (Eco>Low>Mid>High)
Turbo Click Previous Mode
Off Hold 3s Switch to Group 2
Off Click 4x Lockout – main emitter will still respond by blinking quickly twice on click
Lockout Click 4x Unlock to previous mode.
Any Click 3x Strobe
Strobe Click Return to previous mode.

Here’s a UI table for Group 2!

State Action Result
Off Hold Eco
Off Click On (Mode Memory)
Off Double Click Turbo
On Click Off (Except in Turbo)
On Hold Ramp to highest output^
Turbo Click Previous Mode
Off Hold 3s Switch to Group 1
Off Click 4x Lockout – main emitter will still respond by blinking quickly twice on click
Lockout Click 4x Unlock to previous mode.
Any Click 3x Strobe
Strobe Click Return to previous mode.

^ Ramp can sort of do multiple things, depending.  The first ramp after the light is turned on will always be upward (unless you start in Turbo by double-clicking from off.)  And ramp will most often be “up” unless you hold the switch again within around 2 seconds of ramping up, and then the ramp will be down.

LED and Beam

Wurkkos uses a Samsung LH351d in the FC11.  In this case it’s a 2700K emitter, which means it’s warm white (WW), or “very warm.”

wurkkos fc11 flashlight emitter

I consider “very warm” lights to be fantastic for around the house at night lights.  Lights that won’t be abrasive, and potentially disturb sleepers with their coolness.  The 2700K of this light is perfect in that regard.  Also the high CRI (or “higher” CRI at 90) is great for this purpose, too.

wurkkos fc11 flashlight on low

These beamshots are always with the following settings:  f8, ISO100, 0.3s shutter, and manual 5000K exposure.

Tint vs BLF-348 (KillzoneFlashlights.com 219b version) (affiliate link)

I keep the test flashlight on the left, and the BLF-348 reference flashlight on the right.

I compare everything to the KillzoneFlashlights.com 219b BLF-348 because it’s inexpensive and has the best tint!


What I like

  • 2700K is just great.
  • Also a high CRI emitter
  • Complete package for under $30 is a deal
  • Ramping UI option for those who like that
  • USB-C charging is forward-thinking

What I don’t like

  • The pocket clip is not fantastic
  • Charging is a little slow


  • This light was provided by Wurkkos for review. I was not paid to write this review.
  • This content originally appeared at zeroair.org.  Please visit there for the best experience!
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16 thoughts on “Wurkkos FC11 2700K Flashlight Review”

  1. Interesting. It heats up more than Convoy S2+ SST20 2700K. I thought the LH351d emitter is more efficient than SST20

  2. Brian Kim-Eng

    I recently opted for this same tint. It’s a great light for outside and at night. Been loving it so far! I’m tempted to pick up another but the clip is a real downfall for me.

    1. I hear ya! I love the 2700K. Super great for wandering around the house at night. Clip hasn’t really bothered me but then, for my uses of this light, I don’t really clip.

  3. A quiescent current of 1.5 mA is way too high to be acceptable. This will drain the included battery in less than three months and makes the light unsuitable for muggles. Every other time when they pick it up it will be dead.

  4. Pingback: Holiday Flashlight Guide 2021 - You Should Buy These! - ZeroAir Reviews

  5. Great review, yours are helping me decide between this (but at 4000K), the TS21 and the Sofirn SC31 Pro.
    Maybe you’ll be able to help me a bit: there’s reviews that say the TS21 makes a high pitch noise, is this true in your experience? Also between those three in which order you’d put them regarding better flooding?

    1. It could make a high-pitched noise, but I don’t recall hearing it.

      Between all those three you mentioned, I still have the FC11 out and use it often. I use it with the 18350 cell tube, though.

  6. Thanks for your help, I’ve just received mine and I’ve noticed something of a bad design that isn’t mentioned anywhere, I’ll try to explain it clearly:

    Memory mode supposedly leaves the lamp in your previous manually set intensity (steeped or ramped).
    -Put it in whatever intensity but ECO, power off.
    -OFF>>CLICK will correctly start in that whatever intensity. Power off.
    -OFF>>HOLD will start in ECO. Power off.
    -OFF>>CLICK should start in your set intensity, but it doesn’t, it will start in ECO! And not until you enter another mode (turbo, strobe) memory will properly recover (this tells us the memory correctly saves the state, but normally turning on after using hold to ECO botches it).

    This effectively renders OFF>>HOLD useless. Alternatively, this effectively renders the memory state useless.

    I think it would be better for the lamp to always OFF>>CLICK in your previous intensity, and leave ECO in OFF>>HOLD (or manually set, of course). That was the main reason I decided for this lamp, I assumed it had two startup modes, one you set, one in ECO.

    Maybe I got a defective one?

    Could you confirm please? Maybe, you being a lamp fan could explain better the rationale behind this.

    1. That’s not how mine works.

      From off, long gold gets floor/ lowest mode set in either ramp or stepped config.

      From off, on click gets last level.

      Make sure your not clicking too fast or else you’ll get… Something else. Anduril can be tricky at times. If all you want in a light is a long press to super low, and normal press to memory, there are other lights for you.

      1. Thanks for your answer, Brian, but I don’t think I was clear, proven by the fact that you think this lamp has Anduril. I asked the same in the Reddit flashlight sub and all agreed it worked precisely as I described.

  7. I just ordered an fc11 in 2700k, Amazon has a sale on them. The very warm, soft light will be great for simulating sunrise and early morning light, though I may still be after a good 3500k light if you know of any with high cri. The steep drop down in brightness doesn’t bother me here like it normally would as for my uses I’d hardly use this light at higher lumens anyways. Excited to see it in action!

    1. I’m very happy with the FC11! I like the simpler UI, and my copy reads 2900-3000k and 94 cri which is a beautiful soft tone. Really does wonders for that “romantic” look in photos. Big thumbs up!

  8. uliwm@arcor.de

    Great Test.
    One remark regarding your runtimes and the following Modes and Currents: Wurkkos used a 3500mAh battery for their ANSI/NEMA FL1 Chart (see manual “Notes”) instead the delivered 3000 mAh.
    It would be interesting which battery they used and what is the outcome in runtimes.

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